超小纳米Co<sub>3</sub>O<sub>4</sub>耦合高含氮碳复合材料的电催化析氧性能研究

李艳; 程庆彦; 刘栋杰; 杨淑慧; 胡良艳; 谷云含; 石华; 乔金栋

doi:10.1016/S1872-5813(22)60003-3

超小纳米Co₃O₄耦合高含氮碳复合材料的电催化析氧性能研究

doi: 10.1016/S1872-5813(22)60003-3

李艳^1,,
程庆彦^1, ,,
刘栋杰¹,
杨淑慧¹,
胡良艳¹,
谷云含¹,
石华^2, ,,
乔金栋³

1.
河北工业大学绿色化工与高效节能河北省重点实验室, 天津市本质安全化工技术重点实验室, 天津 300130
2.
中国天辰工程有限公司, 天津 300499
3.
天津杰斯曼建筑材料有限公司, 天津 300382

基金项目: 河北省自然科学基金（B2018202293）资助

详细信息

通讯作者:
Tel: 13821909658，E-mail: chengqingyan@hebut.edu.cn

shihua@cntcc.cn

中图分类号: TQ151.1
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- 被引次数: 0
出版历程
- 收稿日期: 2021-12-17
- 修回日期: 2022-02-13
- 录用日期: 2022-02-25
- 网络出版日期: 2022-03-07
- 刊出日期: 2022-08-01

Electrocatalytic oxygen evolution of ultrafine nano-Co₃O₄ coupled with N-rich carbon composites

1.
Key Laboratory of Green Chemical Technology & High Efficient Energy Saving of Hebei Province, Tianjin Key Laboratory of Chemical Process Safety, Hebei University of Technology, Tianjin 300130, China
2.
China Tianchen Engineering Corporation, Tianjin 300499, China
3.
Tianjin Jiesiman Building Materials Co., Ltd., Tianjin 300382, China

Funds: The project was supported by Natural Science Foundation of Hebei Province (B2018202293).

摘要

摘要: 过渡金属氧化物是一种具有高效催化活性的电解水析氧反应催化剂，但低电子电导率限制了其催化活性，将活性纳米材料与导电基质材料复合，是构筑高性能电极材料或电化学催化剂的有效途径。采用溶剂热法制备了负载在C₃N₄上的聚合卟啉，经Co元素修饰和热处理后得到Co₃O₄/NC催化剂，采用XRD、SEM、TEM、XPS和FT-IR等方法对催化剂的物理化学性质进行表征。结果表明，Co₃O₄/NC-600具有超小纳米Co₃O₄结构，且其含氮量高，吡啶N与Co之间产生了协同作用，催化剂在OER反应中表现出良好的催化性能，其Tafel斜率仅为66.4 mV/dec，达到10 mA/cm²的电流密度所需的过电势为343.3 mV。
- 电催化剂 /
- 卟啉 /
- 析氧反应 /
- 过渡金属氧化物 /
- Co₃O₄
Abstract: Transition metal oxide is a kind of catalyst with high catalytic activity for electrocatalytic oxygen evolution reaction. However, the catalytic activity is limited by the low electronic conductivity. The effective way to construct high performance electrode material or electrochemical catalyst is combining the nano material with conductive matrix material. The polymerized porphyrins supported on C₃N₄ were prepared by solvothermal method. The Co₃O₄/NC catalyst was prepared by Co modification and heat treatment of BDA-PY/C₃N₄. The physicochemical properties of the catalyst were characterized by XRD, SEM, TEM, XPS and FT-IR, and so on. The results indicate that Co₃O₄/NC-600 possesses a super-small nano-Co₃O₄ structure and high nitrogen content. The strong chemical bond between pyridinic N of the nitrogen-doped carbon and Co is formed, resulting in a synergistic effect, which makes the catalyst show good catalytic performance in OER reaction. Its Tafel slope is only 66.4 mV/dec and the minimum overpotential is 343.3 mV when the current density reaches 10 mA/cm².
- electrocatalyst /
- porphyrin /
- oxygen evolution reaction /
- transition metal oxide /
- Co₃O₄

HTML全文

FIG. 1689. FIG. 1689.

FIG. 1689. FIG. 1689.

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图 1 Co₃O₄/NC-t及其前驱体的FT-IR谱图

Figure 1 FT-IR spectra of Co₃O₄/NC-T and its precursors

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图 2 (a) Co₃O₄/NC-600的SEM照片；((b)−(e)) BDA-PY-Co/C₃N₄、Co₃O₄/NC-500、Co₃O₄/NC-600和Co₃O₄/NC-800的TEM照片；(f) Co₃O₄/NC-600的HRTEM照片

Figure 2 (a) SEM image of Co₃O₄/NC-600; ((b)−(e)) TEM images of BDA-PY-Co/C₃N₄, Co₃O₄/NC-500, Co₃O₄/NC-600 and Co₃O₄/NC-800; (f) HRTEM image of Co₃O₄/NC-600

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图 3 Co₃O₄/NC-t及其前驱体的XRD谱图

Figure 3 XRD patterns of Co₃O₄/NC-T and its precursors

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图 4 XPS谱图 (a) BDA-PY-Co/C₃N₄与Co₃O₄/NC-600的N 1s谱图；(b) BDA-PY-Co/C₃N₄、Co₃O₄/NC-600和Co₃O₄/NC-800的Co 2p谱图

Figure 4 XPS spectra of (a) N 1s spectra of BDA-PY-Co/C₃N₄ and Co₃O₄/NC-600; (b) Co 2p spectra of BDA-PY-Co/C₃N₄, Co₃O₄/NC-600 and Co₃O₄/NC-800

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图 5 Co₃O₄/NC-t及其前驱体的OER性能

Figure 5 (a) Polarization curves and (b) Tafel slopes of Co₃O₄/NC-t and its precursors

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图 6 (a) Co₃O₄/NC-t及其前驱体的电化学阻抗谱和等效电路图；(b) Co₃O₄/NC-600的循环伏安曲线；(c) Co₃O₄/NC-t及其前驱体在不同扫速下的双电层电容

Figure 6 (a) EIS and equivalent circuit diagram of Co₃O₄/NC-t and its precursors; (b) CVs of Co₃O₄/NC-600; (c) Double layer capacitance of Co₃O₄/NC-t and its precursors at different scan rates

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图 7 (a) Co₃O₄/NC-600在10 mA/cm²下的恒电流曲线；((b)−(c)) 进行稳定性测试后的Co₃O₄/NC-600及其局部放大的SEM照片

Figure 7 (a) Constant current curve of Co₃O₄/NC-600 at 10 mA/cm²; (b-c) SEM images of Co₃O₄/NC-600 after the stability measurement

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